Demountable rim



O. E. DINGLEY DEMOUNTABLE RIM Filed May 10, 1921 @Efo 747763@ PatentedJan. 27, 1925.

ED ST TESL l 1,524,1z31 Partnr carries.

O'IIS E.. DINGLEY,. OF WEST FARMIN.GTON MAINE.

DEMOUN'IYABIJE RIM.

Applicaticnled May 10,- 192i.

Demomitable Rims, of which the following is a specification.

This invention concerns df'einountab'le rims for vehicle wheels andrelates more particularly to means ,for connecting the rim tothe follyof the wheel. Connecting means of the general character to which thisinveiition apperta'ins is disclosed in the patentto Dingley, No.1,205,866, November 2li, 1916. In the patented device, the `rim`retaining bolts, which are carried by the felfl'y, are provided withsubstantially cylindrical ends engageabl'e with sockets of simi-lar formin the rim. lvhile very effective for the desired purpose, aconsiderable degree of care is necessary in the preliminary positioningof the parts in order to ensure the entrance of the bolt ends into theirrespective sockets, with which they are made closely to interiit.

The principal object of the present invention is to so improve thedevice of the abo-ve noted patent and particularly the cooperatingportions of the attaching' bolts and their sockets as to facilitate theengagement of the bolts with their sockets, even though in the initialposition of the parts the `bolts and their respective sockets belsomewhat ont of alignment or eccentric one to the other. Thecontemplated improvement has the further advantage, that even though thesocket be obstructed, as for example, by the formation of burrs aboutits edges or by the presence of mud or other foreign material therein7the proper and certain entrance of the bolt is substantially assured.

As a preferred embodiment of means for carrying into effect the aboveobject, that disclosed in the accompanying drawings may be employed, andinwhichf- Fig. 1 is a side elevation illustrating a vehicle wheelembodyingthe present invention;

Fig 2 is a cross section, to enlarged scale, showing the presentinvention as applied to the attaching' of the demountable rim to thewheel folly;

Fig. 3 is a fragn'ientary cross section showing a modification of thedevice of Fig. 2;

S'elial N10. 4%83286.

Fig; 4 is a view similar to. Fig. 3 i-llustrating a furthermodification; and

Fig; 5l i-s a fragmentary plan view of the outer side of the fellyillustrating an arrangement employed at onel point thereon. Referring tothedrawings there is indi cated in Fig. 2 a wheel of usual form comeprising a hub 1i, spokes 2, and a fel Y 3, such fel'ly lliavfing 5mounted thereon `the de m-onntable .rim- 4 carrying the tire 5.

The demonntalble rim lA is indicated as provided with an opening at 61(Fig. 2f)` such opening being one ot' a series of openings spaced apartabout the pe rim and preferably so arrailiged as to-.coine opposite thespaces between every other pair of spokes 2 vof the wheel. Within theopenings 6 are seated disk mem-bers 7 pif erably provided with `radialirlanges 81 whh overlapthe inner surface of the rim. lVhile in.accordance with the present disclosure, these disk mein-bers are madeindependent of 'the rim and seated therein, 'being formed of a harderandinore wear-resistant material than thatof the rim, it is contemplatedthat they may, if desired, be formed as integral portions of the rim, asclearly disclosed in the patent above referred to. These disk membersprovide thickened portions or bosses having the-rein radially disposedsocket openings 9. As disclosed in Fig. 2, such socket openings are ofsubstantially conical form, tapering to a point at their inner ends.

The -felly 3 is provided with a series ofv metallic sleeves 10,corresponding in numberto the disk members 7 in the rim, and arranged toalign therewith. The sleeves 10 may, if desired, be provided with flangeportions 8 which, lin opera-tive position, lie flush with the outersurface of the felly, the sleeves being 'forcedinto openings in-thefelly and being provided, if desired, with i'ins such as indicated inthe above noted patent, whereby to prevent rotation of the sleeveswithin their respective openings. The sleevese 10 are provided withinternal screw threads 12 of relatively coarse pitch, and engageablewith such screw threads are threads 14 carried by the central portionsof attaching bolts 13. In accordance with the preferred arrangement, thebolts 13 at their inner ends, that isto say, the ends which` normallyextend toward the hub of thev wheel, are somewhat reduced in diameterand provided with screw threads 15 of finer riphery of the w lll) pitch,with which Vlatter threads engage lock nuts such as 16. The inner endsof the bolts 13 are preferably formed with square heads, or in any otherdesired manner permitting ready application of a. tool thereto, forrotatably adjusting the bolt. At their outer portions, the bolts 13 areformed With tapered ends, such ends being indicated in Fig. 2 as ofconical form, thus providing surfaces engageable with the conicalsockets 9. l

The rim and felly, at corresponding points therein, are provided withsuitable openings for the passage of4 the usual tire valve 21, and at apoint substantially oppo site such openings, the outer surface of thefelly may be provided with aV rib 22, substantially of U form,encircling the threaded opening in one of the sleeves 10, such ribserving to guide the corresponding flange 8 into proper alignment withthe threadedv opening in the sleeve 10 as the rim is slipped over thefelly. Y

In the operation of the parts above def' scribed, the rim having beenplaced'over the felly, the several bolts 13 are rotated by means oftheir angular heads, thereby causing them to move radially outward 'andrim is indicated at Lla having the disk memf' Cil bringing theirtapering end portions into engagement With the corresponding sockets''9. By reason of the provision of the tapering end upon the bolt 13, itis evident that, even though the'socket and bolt be not accuratelyaligned' at the beginning of the operation, the engagement of theinclined surface of the bolt With any portion of the socket openingserves automatically, upon tightening of the bolt, to bring the partsinto alignment. Furthermore, if for any reason the socket be obstructed,as by the presence of mud or other foreign matter therein,the conicalend of the bolt will serve to push aside and squeeze out such material,rather than to compress the sameinto the bottom of the socket, and thuslittle care is necessary on the part of the operator in ensuring aproper seating of the bolts within their respective sockets.Uponcompletion of the adjustment of the bolts, they'may be positivelylocked in position by tightening the lock nuts 16, thereby holding theparts securely in properl position.

In the arrangement shown in Fig. 3, the

bers 7a seated therein. VThe felly is indicated at 3?, having theinternally threaded sleeve 10a secured therein, such sleeve having thethreaded bolt 13L Vpositioned Within it. The members 7, in thisinstance, hoW- ever, is provided With a substantially cylindrical socket23, the bottom Wall of which is' inclined to the axis thereof, thusproviding an end portion of substantially conical form as shown at 9a.The cylindrical end portion of the bolt, indicated at 24, engages withinthe cylindrical portion 23, While the conical end 1Sa of the bolt seats`against the conical bottom wall of the socket. This arrangement securesall the advantages of that previously described, but, in addition,affords engaging surfaces of somewhat greater extent.

In the device illustrated in Fig. 4, the rim 4l is shown as having thcdisk member 7 b seated therein and the felly 3" as having the threadedsleeve 10b secured therein. The threaded bolt 3l is also Shown asengaging the sleeve 10". In this case, the socket in the member 7" has acylindrical portion 27 and at its inner extremity has a face 25substantially perpendicular to its axis. Connecting the face 25 and thecylindrical wall 2T is a beveled or inclined surface 26. The end of thebolt 13b also has a cylindrical portion 2S engaging the cylindrical part27 of the socket and terminates in a square end engaging the face 25.Interposcd between such ilat Vface and the cylindrical portion of thebolt is a bevel face 29 engageable with the surw face 26.

It will be noted with respect to all of the several described forms,that the end of the bolt which engages the socket is provided with aguiding surface inclined to its axis, such guiding surface serving, asthe parts are brought into engagement, automatically to bring them intoaxial alignment. lVhile either of the forms thus described may beemployed in producing the desired result, that indicated in Fig. 3 isregarded as the preferred form wherein all the advantages of the conicalend 'are secured while at the same time an increased area of contactbetween the bolt and its socket is provided.

I-Iaving thus described the invention in a preferred embodiment of thesan1e,'\vhat I claim and desire to secure by Letters Patent of theUnited States is:

In combination with a wheel telly and a detachable rim, said rim havinga plurality of spaced members secured in spaced openings therein, saidmembers being flush with the outer surface of the rim and havinginwardly directed, unobstructed conical socket openings, a plurality ofbolts having external screw threads of coarse pitch 'engaging threadedopenings in the felly, said bolts having conical, solid heads forengagement with the respective socket openings, said bolts at theirouter ends having screw threads of relatively fine pitch, and lockingnuts engaging the last 'named threads whereby to secure the bolts inadjusted position.

Signed by me at Boston, Massachusetts, this 7th day of May, 1921.

OTIS E. DINGLEY.

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